package com.atguigu.gulimall.cart.controller;

import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.gulimall.cart.interceptor.CartInterceptor;
import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.Cart;
import com.atguigu.gulimall.cart.vo.CartItem;
import com.atguigu.gulimall.cart.vo.UserInfoTo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.Arrays;
import java.util.List;
import java.util.PriorityQueue;
import java.util.concurrent.ExecutionException;

/**
 * @Author: WackyBoy
 * @Date: 2021/7/13 9:08
 */
@Controller
public class CartController {

    @Autowired
    CartService cartService;

    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurrentUserItems() {
        return cartService.getUserCartItems();
    }

    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId) {

        cartService.deleteItem(skuId);

        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num) {

        cartService.changeItemCount(skuId, num);
        PriorityQueue<Integer> pq = new PriorityQueue<Integer>((a, b) -> a - b);

        return "redirect:http://cart.gulimall.com/cart.html";
    }



    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId, @RequestParam("checked") Integer checked) {
        cartService.checkItem(skuId, checked);

        return "redirect:http://cart.gulimall.com/cart.html";
    }


    /**
     * 浏览器中有一个cookie: user-key: 标识用户身份, 一个月后过
     * @return
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {
//        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
//        System.out.println(userInfoTo);

        Cart cart = cartService.getCart();
        model.addAttribute("cart", cart);
        return "cartList";
    }

    /**
     * 添加商品到购物车
     * RedirectAttributes: ra
     * ra.addFlashAttribute(): 将数据放在session里面可以在页面中取出, 但是只能取出一次
     * ra.addAttribute(): 将数据放在url后面
     * TODO: 使用重定向解决刷新URL, 页面数据无限提交的问题
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num, RedirectAttributes ra) throws ExecutionException, InterruptedException {

        cartService.addToCart(skuId, num);
//        model.addAttribute("skuId", skuId);
        ra.addAttribute("skuId", skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccessPage.html";
    }

    /**
     * 跳转到成功页
     * @param skuId
     * @param model
     * @return
     */
    @GetMapping("/addToCartSuccessPage.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model) {

        // 重定向到成功页面. 再次查询购物车数据即可
        CartItem item = cartService.getCartItem(skuId);

        model.addAttribute("item", item);
        return "success";

    }


}
